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ZX81 Enhanced ULA replacement module.
Posted: Fri Nov 18, 2011 8:59 pm
by Andy Rea
***SOLD OUT SOLD OUT ***
ZX81 Enhanced ULA replacment module.
£15.00 + postage.
instructions here
http://www.debraclayton.webspace.virgin ... ulamk2.pdf
Paypal preffered but will accept other means of payment.
PM or email ap_rea@[NOSPAM]ntlworld.com for further details. (remove [NOSPAM] - edit by RWAP)
Regards Andy
Re: ZX81 Enhanced ULA replacement module.
Posted: Fri Nov 18, 2011 10:28 pm
by PokeMon
Congratulations for excellent work.
Looks very nice.
I found that the EPM7128SQC-10 could be run at up to 100 MHz. That offers maybe the opportunity to run with double frequency in my ZX81 (13 MHz) in general, not only in turbo mode.
Re: ZX81 Enhanced ULA replacement module.
Posted: Fri Nov 18, 2011 11:52 pm
by Andy Rea
PokeMon wrote:Congratulations for excellent work.
Looks very nice.
I found that the EPM7128SQC-10 could be run at up to 100 MHz. That offers maybe the opportunity to run with double frequency in my ZX81 (13 MHz) in general, not only in turbo mode.
Thank you, i think it would need a fair bit of ROM hacking on the display routines to get it to run at double speed all the time.
Andy
Re: ZX81 Enhanced ULA replacement module.
Posted: Sat Nov 19, 2011 12:14 am
by sirmorris
Sounds like a challenge
Can I collect mine in person Andy?
Re: ZX81 Enhanced ULA replacement module.
Posted: Sat Nov 19, 2011 12:39 am
by Andy Rea
next week C ?
Of course
Anything to save postage eh
Andy
Re: ZX81 Enhanced ULA replacement module.
Posted: Sat Nov 19, 2011 2:34 am
by RWAP
Hi Andy - I hope this sells quite well - I ought to point out that you can sell them through sellmyretro.com for a fairly minimal cost (basically a 2.5% final value fee - no listing fees, as compared to ebay)
Would certainly be a nice thing to offer alongside the ZXvid and ZXpand (although the ZXvid is made redundant by this)!
Re: ZX81 Enhanced ULA replacement module.
Posted: Sat Nov 19, 2011 3:20 am
by Prime
Wouldn't mind one of these too, if only to have a play with, can I collect in preson too, asuming you are coming to the RCM meet Andy ?
Cheers.
Phill.
Re: ZX81 Enhanced ULA replacement module.
Posted: Sat Nov 19, 2011 9:24 am
by Andy Rea
Yes Prime, i'm comming along next week, so thats no problem.
Hi Rich, i thought it best to give the regulars a chance of getting hold of these first at basically my cost price, and providing the feedback is good then maybe i will build more and offer them to the wider audience.
Andy
Re: ZX81 Enhanced ULA replacement module.
Posted: Sat Nov 19, 2011 9:36 am
by sirmorris
Andy Rea wrote:Anything to save postage eh
Rumbled!
I'm hoping Rich is going to pop along too - save even more as I can hand a box-o-zxpand over
C
Re: ZX81 Enhanced ULA replacement module.
Posted: Sun Nov 20, 2011 9:55 am
by RetroTechie
RWAP wrote:(although the ZXvid is made redundant by this)!
Only very, very recently introduced, and it's already obsolete...
What's the ZX81 world coming to?
